Oil filter



Sept. 20, 1932. J. GARDNER ET AL 1,878,630

OIL FILTER Filed May 26, 1930 2 Sheets-Sheet J.

i q x i I l n I I I w H i? I llfi I I b I I I: O C I -g t Fig.1

Se t. 20, 1932. J. GARDNERET AL OIL FILTER Filed May 26, 1930 2Sheets-Sheet 2 IIIIPIIIIIKIIIIIIII I c7 Kari" Ill'llllll-lllllllPatented Sept. 2Q, 1932 umrsn sra'rss IPSASTENT erFg 1 JOSEPH GARDNERAND JOSEPH HUGH s'ro'r'r GARDNER, on PATRIGROFT, NEAR MAN- CHESTER,ENGLAND, ASSIGNOBS TO L. GARDNER & SONS LIIIIITED, PATRICRQFT,

NEAR MANCHESTER, ENGLAND, A BRITISH COMPANY V on. FILTER Applicationfiled May 26, 1930, Serial No. 455,887, and inGreat Britain January 18,1930.

This invention relates to filters for the fuel oil used in compressionignition types of internal combustion engines and comprises an improvedconstruct-ion and arrangement of filter which also serves. to heat thefuel oil so as to facilitate its passage through the filtering material.

Referring to the accompanying sheets of explanatory drawings I Figure 1is a sectional elevation of a fuel oil filter constructed in accordancewith our invention.

Figure 2 is a view looking from left to right of Figure 1 showing theheated base or part upon which the filtering elements are carried. 7

Figure 8 is a plan view of Figure 1.

The same reference letters in the three views indicate the same parts.

The filter is arranged to be bolted or secured by means of stud boltspassing through the holes a, upon a hot part of the engine such as thecylinder block, the water jacket, or the exhaust manifold and the part bofthe filter.

which is in contact with or against the said hot part of the engine, isadapted to receive the ends of two concentric thimble like members 0, clupon which the filtering gauzes e and f are carried. Said thimbles makemetal to metal contact with the heated portion 6 of the filter casing sothat the thimbles and the gauzes thereon are heated by conduction. Saidheated portion 72 of the filter casing has two concentric grooves g, hthere-in, one (g) r of which comes within the inner thimble 0 andcommunicates with the oil outlet branch 71 of the filter by the passagej, whilst the other (h) is outside the outer thimble d and communicateswith the fuel oil inlet branch k by the passage m. The two thimbles arecarried at one end upon a spindle n which screws into the heated portionIn of the filter, the inner thimble 0 being held against removal by apin 0 through the spindle or by other convenient means, whilst the outerthimble has a spring 1) between itself and the filter cover or casing gwhich is secured in place by a wing nut r or the like screwing upon theouter end of the spindle n. Said cover or casing comprises a sump likepart 8 into which solid impurities can settle and from which they can bewithdrawn through a drain cook or plug 25.

The heated base'or portion of the filter may have an air vent fitting uthereon to allow of the expulsion of air fromthe filter, and'also aconnection 4; through which fuel oil which leaks along the enginesprayer valve spindle (not shown) can return to the fuel inlet passagem.

As the thimbles and filtering material are heated by conduction from thehot portion of the filter, through which also the oil enters the filter,such oil is caused to flow freely through such material without thenecessity for previously heating it before it enters the filter. The oilalso leaves the filter through the heated passage j. V

When the filter cover or casing Q is removed, the outer thimble d withits gauze f can be withdrawn for cleaning purposes.

The inner thimble 0 and gauze e are not intended to be removed but actas a permanent guard to prevent the passage of impurities to the fuel Isprayer by way of the outlet branch 2'. r

What We claim is 1. A fuel oil filter for a compression ignition type ofinternal combustion engine com prising a base or portion adapted to besecured upon a hot part of the engine so as to be heated thereby, an oilinlet passage to the filter arranged in said heated part, concentricthimble-like partswith filtergauze thereon making metal to metalcontact'with said heat-ed part, an annular groove formed in the saidheated portion and lying outside the larger filter, the said groovebeing in communication" with the oil inlet passage, a sec ond annulargroove formed in the said v a a 1376,6567

heated portion and lying inside the smaller filter, an oil inlet fromthe filter arranged v in said heated part and communicating with thesaid second annular groove, and a cover for the filter secured to saidheated part by 5 a spindle which passes through the said thimbles intosaid heated part. 2. In a fuel .oil filter as claimed in claim 1, theprovision of means preventing the 1 withdrawal of the inner thiinble andof a 0 spring between the outer'thimble and the cover. In testimonywhereof we have signed our names to this specification.

JOSEPH GARDNER. i

' JOSEPH HUGH STOTT GARDNER. V

